198539580660 has 48 divisors (see below), whose sum is σ = 559592380032. Its totient is φ = 52593264000.

The previous prime is 198539580653. The next prime is 198539580661. The reversal of 198539580660 is 66085935891.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 198539580594 and 198539580603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198539580661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10947871 + ... + 10965990.

It is an arithmetic number, because the mean of its divisors is an integer number (11658174584).

Almost surely, 2^198539580660 is an apocalyptic number.

198539580660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198539580660 is an abundant number, since it is smaller than the sum of its proper divisors (361052799372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198539580660 is a wasteful number, since it uses less digits than its factorization.

198539580660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21914024 (or 21914022 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 60.

The spelling of 198539580660 in words is "one hundred ninety-eight billion, five hundred thirty-nine million, five hundred eighty thousand, six hundred sixty".